90
Test Operation, Troubleshooting and Maintenance
Replacement of the electric expansion valve
Note: be sure there is no refrigerant inside the system and power supply has been cut off before
replacement.
Steps Image Instructions
4. Take out the main
body.
Take out the main body of the electric
expansion valve.
5. Replace it with a
new one.
• Solder pipes.
• Do charge nitrogen during soldering.
• Protection measures should be
taken during soldering to prevent
surrounding objects from being burnt
out.
6. Tighten coils,
pipe clamps and
rubber pads;
vacuum the system;
recharge refrigerant
and then put back
the panel.
• The bulge of the coil should match
with the recess of the main body of
the valve.
• Keep the vacuum degree to -1.0bar.
Vacuuming period would be longer
for the repaired unit.
• Charged refrigerant should be
the same as that stated at the
nameplate.
• Power off the unit and then power it
on again.
• Put back the panel.
(3) LSQWRF130VM/NhA-M
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